<?php
namespace app\admin\controller;

class Index extends Base
{
    public function index()
    {
        return view('index');
    }
    public function logout(){
        session('admin_id',null);
        session('admin_us',null);
        $this->redirect('login/index');
    }
    function makedec($data){
        $data=str_split($data,2);
        $str='';
        foreach($data as $v){
            $str.=hex2bin($v);
        }
        return $str;
    }
    function wwmakedec($data){
        $data=str_split($data,2);
        $str='';
        foreach($data as $v){
            $str.=hex2bin($v);
        }
        return $str;
    }
    public static $crc16htab = array(
        0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
        0x81, 0x91, 0xa1, 0xb1, 0xc1, 0xd1, 0xe1, 0xf1,
        0x12, 0x02, 0x32, 0x22, 0x52, 0x42, 0x72, 0x62,
        0x93, 0x83, 0xb3, 0xa3, 0xd3, 0xc3, 0xf3, 0xe3,
        0x24, 0x34, 0x04, 0x14, 0x64, 0x74, 0x44, 0x54,
        0xa5, 0xb5, 0x85, 0x95, 0xe5, 0xf5, 0xc5, 0xd5,
        0x36, 0x26, 0x16, 0x06, 0x76, 0x66, 0x56, 0x46,
        0xb7, 0xa7, 0x97, 0x87, 0xf7, 0xe7, 0xd7, 0xc7,
        0x48, 0x58, 0x68, 0x78, 0x08, 0x18, 0x28, 0x38,
        0xc9, 0xd9, 0xe9, 0xf9, 0x89, 0x99, 0xa9, 0xb9,
        0x5a, 0x4a, 0x7a, 0x6a, 0x1a, 0x0a, 0x3a, 0x2a,
        0xdb, 0xcb, 0xfb, 0xeb, 0x9b, 0x8b, 0xbb, 0xab,
        0x6c, 0x7c, 0x4c, 0x5c, 0x2c, 0x3c, 0x0c, 0x1c,
        0xed, 0xfd, 0xcd, 0xdd, 0xad, 0xbd, 0x8d, 0x9d,
        0x7e, 0x6e, 0x5e, 0x4e, 0x3e, 0x2e, 0x1e, 0x0e,
        0xff, 0xef, 0xdf, 0xcf, 0xbf, 0xaf, 0x9f, 0x8f,
        0x91, 0x81, 0xb1, 0xa1, 0xd1, 0xc1, 0xf1, 0xe1,
        0x10, 0x00, 0x30, 0x20, 0x50, 0x40, 0x70, 0x60,
        0x83, 0x93, 0xa3, 0xb3, 0xc3, 0xd3, 0xe3, 0xf3,
        0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72,
        0xb5, 0xa5, 0x95, 0x85, 0xf5, 0xe5, 0xd5, 0xc5,
        0x34, 0x24, 0x14, 0x04, 0x74, 0x64, 0x54, 0x44,
        0xa7, 0xb7, 0x87, 0x97, 0xe7, 0xf7, 0xc7, 0xd7,
        0x26, 0x36, 0x06, 0x16, 0x66, 0x76, 0x46, 0x56,
        0xd9, 0xc9, 0xf9, 0xe9, 0x99, 0x89, 0xb9, 0xa9,
        0x58, 0x48, 0x78, 0x68, 0x18, 0x08, 0x38, 0x28,
        0xcb, 0xdb, 0xeb, 0xfb, 0x8b, 0x9b, 0xab, 0xbb,
        0x4a, 0x5a, 0x6a, 0x7a, 0x0a, 0x1a, 0x2a, 0x3a,
        0xfd, 0xed, 0xdd, 0xcd, 0xbd, 0xad, 0x9d, 0x8d,
        0x7c, 0x6c, 0x5c, 0x4c, 0x3c, 0x2c, 0x1c, 0x0c,
        0xef, 0xff, 0xcf, 0xdf, 0xaf, 0xbf, 0x8f, 0x9f,
        0x6e, 0x7e, 0x4e, 0x5e, 0x2e, 0x3e, 0x0e, 0x1e
    );
    public static $crc16ltab = array(
        0x00, 0x21, 0x42, 0x63, 0x84, 0xa5, 0xc6, 0xe7,
        0x08, 0x29, 0x4a, 0x6b, 0x8c, 0xad, 0xce, 0xef,
        0x31, 0x10, 0x73, 0x52, 0xb5, 0x94, 0xf7, 0xd6,
        0x39, 0x18, 0x7b, 0x5a, 0xbd, 0x9c, 0xff, 0xde,
        0x62, 0x43, 0x20, 0x01, 0xe6, 0xc7, 0xa4, 0x85,
        0x6a, 0x4b, 0x28, 0x09, 0xee, 0xcf, 0xac, 0x8d,
        0x53, 0x72, 0x11, 0x30, 0xd7, 0xf6, 0x95, 0xb4,
        0x5b, 0x7a, 0x19, 0x38, 0xdf, 0xfe, 0x9d, 0xbc,
        0xc4, 0xe5, 0x86, 0xa7, 0x40, 0x61, 0x02, 0x23,
        0xcc, 0xed, 0x8e, 0xaf, 0x48, 0x69, 0x0a, 0x2b,
        0xf5, 0xd4, 0xb7, 0x96, 0x71, 0x50, 0x33, 0x12,
        0xfd, 0xdc, 0xbf, 0x9e, 0x79, 0x58, 0x3b, 0x1a,
        0xa6, 0x87, 0xe4, 0xc5, 0x22, 0x03, 0x60, 0x41,
        0xae, 0x8f, 0xec, 0xcd, 0x2a, 0x0b, 0x68, 0x49,
        0x97, 0xb6, 0xd5, 0xf4, 0x13, 0x32, 0x51, 0x70,
        0x9f, 0xbe, 0xdd, 0xfc, 0x1b, 0x3a, 0x59, 0x78,
        0x88, 0xa9, 0xca, 0xeb, 0x0c, 0x2d, 0x4e, 0x6f,
        0x80, 0xa1, 0xc2, 0xe3, 0x04, 0x25, 0x46, 0x67,
        0xb9, 0x98, 0xfb, 0xda, 0x3d, 0x1c, 0x7f, 0x5e,
        0xb1, 0x90, 0xf3, 0xd2, 0x35, 0x14, 0x77, 0x56,
        0xea, 0xcb, 0xa8, 0x89, 0x6e, 0x4f, 0x2c, 0x0d,
        0xe2, 0xc3, 0xa0, 0x81, 0x66, 0x47, 0x24, 0x05,
        0xdb, 0xfa, 0x99, 0xb8, 0x5f, 0x7e, 0x1d, 0x3c,
        0xd3, 0xf2, 0x91, 0xb0, 0x57, 0x76, 0x15, 0x34,
        0x4c, 0x6d, 0x0e, 0x2f, 0xc8, 0xe9, 0x8a, 0xab,
        0x44, 0x65, 0x06, 0x27, 0xc0, 0xe1, 0x82, 0xa3,
        0x7d, 0x5c, 0x3f, 0x1e, 0xf9, 0xd8, 0xbb, 0x9a,
        0x75, 0x54, 0x37, 0x16, 0xf1, 0xd0, 0xb3, 0x92,
        0x2e, 0x0f, 0x6c, 0x4d, 0xaa, 0x8b, 0xe8, 0xc9,
        0x26, 0x07, 0x64, 0x45, 0xa2, 0x83, 0xe0, 0xc1,
        0x1f, 0x3e, 0x5d, 0x7c, 0x9b, 0xba, 0xd9, 0xf8,
        0x17, 0x36, 0x55, 0x74, 0x93, 0xb2, 0xd1, 0xf0
    );
    /**
     * @param string $data
     * @return string
     */
    public static function calculate($data)
    {
        $hi = 0;
        $lo = 0;
        $index = null;
        foreach (str_split($data, 2) as $char) {
            $byte = ord($char);
            $index = $hi ^ $byte;
            $hi = $lo ^ self::$crc16htab[$index];
            $lo = self::$crc16ltab[$index];
        }
        return dechex(($hi << 8) | $lo);
    }
}
